Been a long time since I read Vonnegut, but a lot of it does stick with you. There is always that flavor of cynicism which I think comes a bit from the campus/"beat" coffee-house culture of the fifties and sixties, but in his case it's always tempered with compassion and humor.

Reading these rather silly Dark Tower books from King, I kept getting whiffs, as it were of Vonnegut's style—I remember very clearly Vonnegut using the concept of a karass I believe it was— in one of his books(maybe God Bless You, Mr. Rosewater?) that is, a group of people aligned together whose fates are inextricably mingled through eternity. Found it rather derivative of King to re-use this calling it a "ka-tet" for his little group of planeswalking weirdos.
In fact, I'm having a hard time getting on with the series. It's kind of like junk food of the mind—